dm-integrity: Do not emit journal configuration in DM table for Inline mode

The Inline mode does not use a journal; it makes no sense to print
journal information in DM table. Print it only if the journal is used.

The same applies to interleave_sectors (unused for Inline mode).

Also, add comments for arg_count, as the current calculation
is quite obscure.

Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

Author: mbroz

drivers/md/dm-integrity.c

@@ -3790,16 +3790,18 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
 		break;
 
 	case STATUSTYPE_TABLE: {
-		arg_count = 3;
+		arg_count = 1; /* buffer_sectors */
 		arg_count += !!ic->meta_dev;
 		arg_count += ic->sectors_per_block != 1;
 		arg_count += !!(ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING));
 		arg_count += ic->reset_recalculate_flag;
 		arg_count += ic->discard;
-		arg_count += ic->mode == 'J';
-		arg_count += ic->mode == 'J';
-		arg_count += ic->mode == 'B';
-		arg_count += ic->mode == 'B';
+		arg_count += ic->mode != 'I'; /* interleave_sectors */
+		arg_count += ic->mode == 'J'; /* journal_sectors */
+		arg_count += ic->mode == 'J'; /* journal_watermark */
+		arg_count += ic->mode == 'J'; /* commit_time */
+		arg_count += ic->mode == 'B'; /* sectors_per_bit */
+		arg_count += ic->mode == 'B'; /* bitmap_flush_interval */
 		arg_count += !!ic->internal_hash_alg.alg_string;
 		arg_count += !!ic->journal_crypt_alg.alg_string;
 		arg_count += !!ic->journal_mac_alg.alg_string;
@@ -3818,14 +3820,15 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
 			DMEMIT(" reset_recalculate");
 		if (ic->discard)
 			DMEMIT(" allow_discards");
-		DMEMIT(" journal_sectors:%u", ic->initial_sectors - SB_SECTORS);
-		DMEMIT(" interleave_sectors:%u", 1U << ic->sb->log2_interleave_sectors);
+		if (ic->mode != 'I')
+			DMEMIT(" interleave_sectors:%u", 1U << ic->sb->log2_interleave_sectors);
 		DMEMIT(" buffer_sectors:%u", 1U << ic->log2_buffer_sectors);
 		if (ic->mode == 'J') {
 			__u64 watermark_percentage = (__u64)(ic->journal_entries - ic->free_sectors_threshold) * 100;
 
 			watermark_percentage += ic->journal_entries / 2;
 			do_div(watermark_percentage, ic->journal_entries);
+			DMEMIT(" journal_sectors:%u", ic->initial_sectors - SB_SECTORS);
 			DMEMIT(" journal_watermark:%u", (unsigned int)watermark_percentage);
 			DMEMIT(" commit_time:%u", ic->autocommit_msec);
 		}